feat: add tracing instrumentation to backend routes

backend/src/legacy_routes.rs

@@ -0,0 +1,99 @@
+use axum::{extract::State, http::StatusCode, response::IntoResponse, Json};
+use serde::Serialize;
+
+use crate::auth::{self, ChallengeResponse, ChallengeStore};
+
+#[derive(Serialize)]
+pub struct HealthResponse {
+    status: String,
+    service: String,
+}
+
+// ─── Auth (public) ───────────────────────────────────────────────────────
+
+pub async fn get_challenge(
+    State(store): State<ChallengeStore>,
+) -> Json<ChallengeResponse> {
+    Json(auth::generate_challenge(&store))
+}
+
+// ─── Health (public) ─────────────────────────────────────────────────────
+
+pub async fn health() -> Json<HealthResponse> {
+    Json(HealthResponse {
+        status: "ok".to_string(),
+        service: "comebackhere-backend".to_string(),
+    })
+}
+
+// ─── Merchant routes (protected) ─────────────────────────────────────────
+
+pub async fn merchant_dashboard() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Merchant dashboard data" }))
+}
+
+pub async fn merchant_invoices() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Merchant invoices list" }))
+}
+
+pub async fn create_merchant_invoice() -> impl IntoResponse {
+    (
+        StatusCode::CREATED,
+        Json(serde_json::json!({ "message": "Invoice created" })),
+    )
+}
+
+// ─── Signer routes (protected) ───────────────────────────────────────────
+
+pub async fn get_pending_settlements() -> impl IntoResponse {
+    Json(serde_json::json!({ "settlements": [] }))
+}
+
+pub async fn approve_settlement() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Settlement approved" }))
+}
+
+pub async fn get_disputes() -> impl IntoResponse {
+    Json(serde_json::json!({ "disputes": [] }))
+}
+
+pub async fn vote_dispute() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Vote recorded" }))
+}
+
+pub async fn get_signers() -> impl IntoResponse {
+    Json(serde_json::json!({ "signers": [] }))
+}
+
+pub async fn add_signer() -> impl IntoResponse {
+    (
+        StatusCode::CREATED,
+        Json(serde_json::json!({ "message": "Signer added" })),
+    )
+}
+
+pub async fn remove_signer() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Signer removed" }))
+}
+
+pub async fn rotate_signers() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Signers rotated" }))
+}
+
+// ─── Admin routes (protected) ────────────────────────────────────────────
+
+pub async fn admin_dashboard() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Admin dashboard" }))
+}
+
+pub async fn admin_pause_contract() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Contract paused" }))
+}
+
+pub async fn admin_unpause_contract() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Contract unpaused" }))
+}
+
+pub async fn admin_settlement_report() -> impl IntoResponse {
+    Json(serde_json::json!({ "message": "Settlement report" }))
+}

backend/src/main.rs

@@ -40,6 +40,16 @@ struct ApiDoc;
 
 #[tokio::main]
 async fn main() {
+    // Initialise structured logging.  Level is controlled at runtime via the
+    // RUST_LOG environment variable (e.g. `RUST_LOG=info`).  Defaults to
+    // `info` when the variable is absent.
+    tracing_subscriber::fmt()
+        .with_env_filter(
+            tracing_subscriber::EnvFilter::try_from_default_env()
+                .unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("info")),
+        )
+        .init();
+
     let rpc_url = std::env::var("SOROBAN_RPC_URL")
         .unwrap_or_else(|_| "http://localhost:8000/soroban/rpc".to_string());
     let contract_id = std::env::var("INVOICE_CONTRACT_ID")
@@ -68,7 +78,7 @@ async fn main() {
         .with_state(client);
 
     let addr = "0.0.0.0:3001";
-    println!("comebackhere-backend listening on {addr}");
+    tracing::info!("comebackhere-backend listening on {addr}");
     let listener = tokio::net::TcpListener::bind(addr).await.unwrap();
     axum::serve(listener, app).await.unwrap();
 }